- Martin Landau
- Commander John Koenig
- Barbara Bain
- Dr. Helena Russell
- Catherine Schell
- Maya
- Tony Anholt
- Tony Verdeschi
- Nick Tate
- Alan Carter
- Zienia Merton
- Sandra Benes
- Jeffery Kissoon
- Dr. Ben Vincent
- Toby Robins
- Diana Morris
- Stuart Damon
- Guido Verdeshi
- Jeremy Young
- Jack Bartlett
- Drewe Henley
- Joe Ehrlich
- Patrick Westwood
- Dr. Shaw
- Cher Cameron
- Louisa
- Al Lampert
- Ken Burdett
- Billy J. Mitchell
- Professor Hunter
- Earl Robinson
- Sandstrom
- Robert Sheedy
- Henry
- Nicholas Young
- Peter Rockwell
- Albin Pahernik
- Lizard Animal
- Don Fellows
- GTV Newscaster
- Prentis Hancock
- Paul Morrow
- Nick Hobbs
- Clive Kander
- David Jackson
- Plasma Voice
- Clifton Jones
- David Kano
- Barry Morse
- Prof. Victor Bergman
- Marc Smith
- Narrator
